🖥️ Calculator App (C# Windows Forms)

📖 Overview

This project is a simple Calculator Application built using C# and Windows Forms.

It provides a graphical user interface (GUI) that allows users to perform basic arithmetic operations in an interactive way.

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🚀 Features

• 🧮 Perform basic operations:
  • Addition
  • Subtraction
  • Multiplication
  • Division
• 🖱️ Button-based input (via UI labels)
• ⚡ Real-time expression evaluation
• 🧹 Clear input and output بسهولة
• 🎯 Simple and user-friendly interface

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🧱 Technologies & Concepts

• C#
• Windows Forms (WinForms)
• Event-Driven Programming
• GUI Development
• DataTable.Compute (Expression Evaluation)

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🏗️ System Design

🔹 Form1

Main application window:

• Handles user input
• Displays expression and result

🔹 Event Handlers

Each button (label) triggers an event:

• Appends input to the expression
• Executes calculation when requested

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⚙️ How It Works

1. User clicks buttons (numbers/operators).
2. Input is appended to the main textbox.
3. When "=" is pressed:
   • Expression is evaluated using DataTable.Compute
   • Result is displayed instantly
4. Clear button resets the input/output.

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▶️ Example Use Case

• Perform quick calculations using a GUI instead of console input.

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📊 What I Learned

• Building desktop applications using Windows Forms
• Handling UI events in C#
• Connecting frontend (UI) with backend logic
• Working with built-in evaluation tools

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📌 Future Improvements

• Replace labels with proper buttons
• Add keyboard input support
• Improve error handling (invalid expressions)
• Implement custom calculation logic instead of DataTable
• Enhance UI/UX design

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